Wrench



July 28, 1925.

O. DUDA v WRENCH Fiied Jan. 9, 1923 Fig. 5.

INVENTOR. wade/d (a.

' MWM v V M ATTORNEY.

. general character used in'connection with. deep well drilling operatlonsfor placing or,

Patented July 28, 1925.

warren stares PATENT OFFICE.

OSWALD DUDA, OF HOUSTON, TEXAS. ASSIGNOB, BY MESNE ASSIGNMENTS, TO REED ROLLER BIT COMPANY, OF HOUSTON, TEXAS,A CORPORATION OF WRENCH.

Application filed January 9,1923. Serial No. 611,579. i

To all who-m it may concern:

Be it known that I, OSWALD DUDA, a citizen of the United States, and resident of Houston, in the county of Harris and State of Texas, have invented certain new and useful lillprovements in i Vrenches, of which the following is a, specification.

The invention relates to wrenches of the removingsections ot' the drill stem, though,

of course, it willbe understood that the invention is not limited in this respect. 1 Theinvention is shown in the accompanying drawings in which Figure 1 is a side elevation with the wrench in position on the'object which is l indicated by a dotted line,

Fig. 2 is a'sectional view on line 22 of Fig.1,and

Fig.- 3is a detail side elevation of the head portionoi the wrench with the parts in position, ready to be placedon the object which is to bemanipulated.

This

wrench is provided with jaws 1, 1".

head has pivoted to it at 2a handle, 3 adapt-.

ed to impose ahammer'blow upon'the head of the wrench forwhich purpose the pivot 5. This is of circular. form and is toothed" 2 is oil to one side ofthe center line of the. head and the handle has a hammer portion,

3* provided with-a pin 3 passing through a slot or'slots 3 in the head. A light spring 3 is interposed between the. hammer portion and the head. The head adjacent-the jaw 1 is provided with fixed grips 4: and

the jaw 1 is provided with a movable grip for the major portion of its periphery to provide a grippingsuri'ace. This grip 5 is mounted between the ears .l aoi' the head upon a pin 6.passing through the said ears,

saidgrip. being keyed at 7 to the said pin TheapinG also serves. as a pivot.

'or shaft.

for a strap 14 whichhas its sides in as shown in Fig. 2 mounted upon the portions of the pin which project beyondthe ears 1. This shaft or pin is provided with nuts of a spring 9 which is coiled about the. pin, one end 10 of said spring bear ng upon a lug 11 on the inner side of the washer and 5 it will be noticed, though circular,'is .ec-

centrioally mounted upon the pin 6 and it projects from the jaw 1 into the open space between the jaws so as to act upontheobject which is to be manipulated. The strap 16% 1s of segmental form and it isheld locked in position by a bolt 16 adapted to enter a recess 16 in the jaw 1*,this bolt being The bolt 16 is controlled by a handle 19 which is pivoted at20 to the bolt and has a cam surface 21 which, when the handle 19 is turned into the position shown in Fig. 3, will work upon the face of the boss 17 and retractthe bolt from the recess 16 so that then the strap 14 can be swung back to the position shown in Fig. The strap is pro- In these drawings the head 1 of the vided with an extension 22 acent its pivot end which, when the strap is thrown back as vshown in Fig. 3, will be in position to engage the object, so that in thrusting the wrench into place, this extension will engage the objection, and throw the strap into closed position. 4 i

It will be noticed grip 5 has been, moved by the spring 9, pressing against the lug 11 of the washer 8 at one end, andagainst the fixed pin 13 at the other end, into a position of maximum protrusion beyond the inner face of the jaw or strap 14:, and thisis the position of the grip. when not in action, against the object. Fig.1 shows that the grip has receded outwardly slightly against the pressure of the spring 9, but is exerting its gripping action upon the object.

irom '3 that the .In order-to place the wrench on the object,

assuming that the parts arein the position of Fig. 3, with the strap 14 thrown, back,

the wrench is pushed forwardly to make its jaw. embrace the object, and in this action the extension 22 of the strap, will contact with the object, and the strap will be thrown to closed position, andl if this action is performed with speed, thev momentum ofthe handle 19 when the end of the strap hitsthe jaw 1 will be such as to snap the handle 19 from the position shown in Fig. 3 into the position shown in Fig. 1, thus allowing the spring pressed bolt 16 to seat itself in the socket 16 and retain the strap in closed position.

In this placing action also, the eccentrically mounted grip jaw 5 will recede on contacting with the object due to the yielding otthe spring 9 and when the wrench is fully seated on the object, movement of the handle?) in the arrowdirection will cause the object to be gripped andzturned, the eccentrically mounted grip 5 gripping the object harder according to the degree of pressure exerted on :the handle.

'It will *be noticed that the handle will have some movement before the hammer portion ti -strikes the head and thus a ham- "mer blow will be delivered when the handle is quickly moved in the direction of the arrow and then continued pressure will turn a the object as desired.

In releasing the wrench from the object the handle will be moved in a. direction opposite to that of thearrow in Fig. 1, the grip 5 receding because the spring will allow this action to take place, and in this releasing action the strap remaining'closed, will 'preventthe wrench from flying olt" and injuring the derrick or attendants.

The position of the grip 5 shown in Fig. 3 which is its/extreme protruded position, is limited by the end wall of the slot of the washer 8 coming against the pin 13.

.The grid member 5 maybe turned over when one sideis worn topresent the other part of its toothed periphery for use.

The grips l, 4 while in asense unyield-. ing, are yet adapted to haveslight oscillating'movement in their sockets.

The strap 14; is of channel form and there is one of the projections 22 at eaclr side thereof. The channel form of the "strap provides a structure which will embrace the jaw 1 and sustain the strap laterally .in" position becausethe side walls of this chan "nel construction reach down along side of the aw 1 and "find a lateral bearing thereagainst. The circular form of the grip 5- and its eccentric means provides in fact a nearly involute curved edge for gripping the object.

I claim:

1. In combination, awrench having jaws with a strap pivoted to one jaw and extendting across to the other jaw, and detachably having a curved edge protruding into the space between the jaws, a washeralso se-- the washer and the grip, saidspring being connected thereto, apin on which said strap pivots, a, grip jaw fixed tol said pin and cared to saidpinand a spring for turning coiled about the pivot pinotthe strap,bear

in'g against the washer at one end and scribed.

against a pin on the strap at its. other end,

substantially :as described.

2. In combination in a wrench aws to receive the object between them, a strap pivoted to one jaw and adapted to extend across the space between the jaws to enclose the object, and a gripping jaw movable with the strap to clear the space when the strap is thrown back and to protrude into said :space .to engage the object when the strap is closed, said jaw being movable relative to said strapto recede relative to saidspace when it contacts with the object,

In combination -:in a wrenchihaving aws to receive the object between them, a strap pivoted to one jaw-and adapted to extend across the space between the jaws to enclose theobject and a grippingjaw movablewith thestrap to clear the space when the strap istthrown back and'to :protrude into said space to engage the object when the strap isclosed, said jaw being movable relative to said strap, to rece'de relative to said space when it contacts with the object and "gripping the object when the wrench is turnedto :turn said ob-ject, said strap having aheel extension to be engaged by the object for automatically closing the strap and thus bringing the said gri'p' automatically against thewob-ject', substantially as described. i i V e. A w rench :having jaws with a space be- 5. .In iCOIIlbiDtliBlOIl in a wrench, jaws with a space between them for receiving the article, a strap pivoted to one jaw to extend oversaid space,in eans for locking the strap when closed oversaid space, a grip arranged' adjacent the pivotedlend of said .strap and movably mounted to assume difterent positions relative to said space, and a spring connection between the saidstrap and the .said grip for. pressing said grip yiel'dingly tonproject into saidspace when the strap is closed, substantially as de- .In testimony whereof, afiix m signa ture. i

oswAizin :DUDA. I

"having and gripping the object when the wrench is turned to turn said object, substantially as described. 

